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lambda.js
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lambda.js
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/**
* Copyright 2018 SmartThings
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
* in compliance with the License. You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under the License is distributed
* on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License
* for the specific language governing permissions and limitations under the License.
*
*/
const DiscoveryResponse = require('./discovery/DiscoveryResponse');
const CommandResponse = require('./state/CommandResponse');
const StateRefreshResponse = require('./state/StateRefreshResponse');
const ErrorResponse = require('./STBase');
const ALLOWED_REQUESTS = [
"discoveryRequest",
"stateRefreshRequest",
"commandRequest",
"grantCallbackAccess"
];
function createResponse(interactionType, requestId) {
switch(interactionType) {
case 'discoveryRequest':
return new DiscoveryResponse(requestId);
case 'stateRefreshRequest':
return new StateRefreshResponse(requestId);
case 'commandRequest':
return new CommandResponse(requestId);
case 'grantCallbackAccess':
const badCallback = new ErrorResponse(interactionType, requestId);
badCallback.setError("grantCallbackAccess type not implemented in st-schema-nodejs helper");
return badCallback;
default:
const badType = new ErrorResponse(interactionType, requestId);
badType.setError("error interaction type");
return badType;
}
}
function isValidSchema(schema) {
if (! schema.hasOwnProperty("headers")) {
return false;
}
return (schema.headers.hasOwnProperty("interactionType"));
}
module.exports = function(opts) {
return async function(event, context) {
let request, response;
if (! isValidSchema(event)) {
response = new ErrorResponse();
response.setError("invalid ST schema");
return context.fail(response);
}
const {headers, authentication, devices} = event;
const {interactionType, requestId} = headers;
response = createResponse(interactionType, requestId);
if (response.isError()) {
return context.fail(response);
}
try {
console.log("interactionType", interactionType);
await opts[interactionType](request, response);
} catch(err) {
console.error("ERROR IN ST-SCHEMA HELPER", err);
response.setError(err.message);
return context.fail(response);
}
console.log("response back to SmartThings %j", response)
return context.succeed(response);
}
}